2009-2010 Problem of the Week Calendar

Links to the Packets, Activity Series, and Online Resources (and more!) are available from the individual problem page (linked from the titles below).

Since these problems were Current in the 2009-10 school year, access is restricted to teachers with a Class Membership or higher. More information is available on our Pricing Guide.

If you have a Class Membership or higher, you can also view all of the 2008-09 problems.

Math Fundamentals
	Start	Problem	Mentor Group	Submissions Close	Revisions Close
	Aug 31	Pooling Tips		Sep 13	Sep 17
	Sep 14	Heidi's Hometown		Sep 27	Oct 1
	Sep 28	Greta's Garden		Oct 11	Oct 15
	Oct 12	Buy the Numbers		Oct 25	Oct 29
	Oct 26	Jason's Piggy Bank		Nov 8	Nov 12
	Nov 9	Sundaes		Nov 22	Nov 26
	Nov 23	Just the Facts		Dec 6	Dec 10
	Dec 7	All Aboard!		Dec 20	Dec 24
	Dec 21	Holiday Ornaments		Jan 10	Jan 14
	Jan 11	How Old is Mia?		Jan 24	Jan 28
	Jan 25	Bobsled Sums		Feb 7	Feb 11
	Feb 8	Common Cents		Feb 21	Feb 25
	Feb 22	Pauline the Plumber		Mar 7	Mar 11
	Mar 8	Fish in a Barrel		Mar 21	Mar 25
	Mar 22	Odds vs. Evens		Apr 4	Apr 8
	Apr 5	Assembly Seating		Apr 18	Apr 22
	Apr 19	Clock Work		May 2	May 6
	May 3	A Pound of Tea		May 16	May 20
	May 17	Missing Pages		May 30	Jun 3
	May 31	Trapezoid Teatime		Jun 13	Jun 17
Pre-Algebra
	Start	Problem	Mentor Group	Submissions Close	Revisions Close
	Aug 24	The Oracle's Oration		Sep 6	Sep 10
	Sep 7	At Least a Mile		Sep 20	Sep 24
	Sep 21	Kaytee's Contest		Oct 4	Oct 8
	Oct 5	Watch Where You Step!		Oct 18	Oct 22
	Oct 19	Birthday Line Up		Nov 1	Nov 5
	Nov 2	Chirp! Chirp!		Nov 15	Nov 19
	Nov 16	A Cranberry Craving		Nov 29	Dec 3
	Nov 30	Shortcut Savings		Dec 13	Dec 17
	Dec 14	Time is Power		Jan 3	Jan 7
	Jan 4	Two Toss		Jan 17	Jan 21
	Jan 18	The Oracle's Crowns		Jan 31	Feb 4
	Feb 1	A Snowy Driveway		Feb 14	Feb 18
	Feb 15	Cara's Cookies		Feb 28	Mar 4
	Mar 1	Eight Squares on a Table		Mar 14	Mar 18
	Mar 15	Account Balances		Mar 28	Apr 1
	Mar 29	Spring Garden Planning		Apr 11	Apr 15
	April 12	Shelvin's Scores		Apr 25	Apr 29
	April 26	Holding Pattern		May 9	May 13
	May 10	Val's Value		May 23	May 27
	May 24	Fences for Fido and Friends		Jun 6	Jun 10
Algebra
	Start	Problem	Mentor Group	Submissions Close	Revisions Close
	Aug 31	Mind Reading		Sep 13	Sep 17
	Sep 14	Eduardo's Equation Challenge		Sep 27	Oct 1
	Sep 28	Are You Ready for Some Football?		Oct 11	Oct 15
	Oct 12	Take Me Out to the Ballgame		Oct 25	Oct 29
	Oct 26	Apple Orchard		Nov 8	Nov 12
	Nov 9	From Here to There		Nov 22	Nov 26
	Nov 23	A Surprising Sequence		Dec 6	Dec 10
	Dec 7	Ration Ratios		Dec 20	Dec 24
	Dec 21	Texting 1, 2, 3		Jan 10	Jan 14
	Jan 11	Are You Positive?		Jan 24	Jan 28
	Jan 25	Line Logic		Feb 7	Feb 11
	Feb 8	Building a Bakery		Feb 21	Feb 25
	Feb 22	What Time Is It?		Mar 7	Mar 11
	Mar 8	Lettuce for Sale		Mar 21	Mar 25
	Mar 22	Triangle Possibilities		Apr 4	Apr 8
	Apr 5	Fraction Action!		Apr 18	Apr 22
	Apr 19	Marathon Mitch		May 2	May 6
	May 3	Buried Treasure		May 16	May 20
	May 17	What's the Point?		May 30	Jun 3
	May 31	Many or Money?		Jun 13	Jun 17
Geometry
	Start	Problem	Mentor Group	Submissions Close	Revisions Close
	Aug 24	Visiting Friends		Sep 6	Sep 10
	Sep 7	What's the Angle?		Sep 20	Sep 24
	Sep 21	Congruent Rectangles		Oct 4	Oct 8
	Oct 5	Plane and Simple?		Oct 18	Oct 22
	Oct 19	The Folding Ruler		Nov 1	Nov 5
	Nov 2	Well, Well, Well		Nov 15	Nov 19
	Nov 16	Trisecting a Square		Nov 29	Dec 3
	Nov 30	Is the Fair Fair?		Dec 13	Dec 17
	Dec 14	Square Segments		Jan 3	Jan 7
	Jan 4	Arranging Rectangles		Jan 17	Jan 21
	Jan 18	Whodunnit?		Jan 31	Feb 4
	Feb 1	Ants Marching		Feb 14	Feb 18
	Feb 15	Dendrochronology		Feb 28	Mar 4
	Mar 1	Off on a Tangent		Mar 14	Mar 18
	Mar 15	Similar Perimeter		Mar 28	Apr 1
	Mar 29	How Long is the Base?		Apr 11	Apr 15
	April 12	A Picturesque Pythagorean Proof		Apr 25	Apr 29
	April 26	Pisa's Lean		May 9	May 13
	May 10	Seeing Stars		May 23	May 27
	May 24	Fix This Picture		Jun 6	Jun 10